Few beginner questions on ADSL over ISDN

Answered Question
Sep 17th, 2007
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Hi.I have some questions regarding attaching Cisco routers to an ADSL line.

The situation is like this: at one remote office we have an ADSL over ISDN line and several users of which only one is using the line currently. Now they all have to be able to go to the Internet over the ADSL and be able to use SW VPN client to connect to our main office.

After some research I believe that Cisco 826 will satisfy the needs of the remote office as it allows pass-through for VPN clients and PPoE and will allow users to go to the Internet.

As I have never configured ADSL routers what information do I have to request from the ISP to properly configure the router,can I configure the router to automatically get DNS information from the router and pass it to the users,do I have to allow IPSEC pass-through with a command or is it on by default? And if you have any other advice I'd be grateful for it.

Thanks in advance for any help.

Correct Answer by lgijssel about 9 years 8 months ago

Please check the configuration examples on adsl as shown here:

http://www.cisco.com/en/US/tech/tk175/tk15/tech_configuration_examples_list.html


You will probably not need IPsec passtrough or similar as your configuration likely supports NAT-T. This depends on what you have at the central site. Below is the link for a VPN concentrator:

http://www.cisco.com/en/US/products/hw/vpndevc/ps2284/products_tech_note09186a00800946af.shtml


regards,

Leo

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Correct Answer
lgijssel Mon, 09/17/2007 - 00:48
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Please check the configuration examples on adsl as shown here:

http://www.cisco.com/en/US/tech/tk175/tk15/tech_configuration_examples_list.html


You will probably not need IPsec passtrough or similar as your configuration likely supports NAT-T. This depends on what you have at the central site. Below is the link for a VPN concentrator:

http://www.cisco.com/en/US/products/hw/vpndevc/ps2284/products_tech_note09186a00800946af.shtml


regards,

Leo

paolo bevilacqua Mon, 09/17/2007 - 04:14
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Why an 826 that is out of production? Your best choice would be an 876 or the cheaper 856.

These will do all what you said and more.

IgorHamzic Thu, 09/20/2007 - 07:03
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Indeed, we decided on 876 router that will replace the adsl modem from the provider on location.

Thanks for all your help guys.

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